Treegator® Slow Release Watering Bags can be installed in just minutes with no tools required, and most new plantings require a watering schedule of one refill every 5 to 7 days. The bag continuously waters a planting over an average time period of 5 to 9 hours and delivers the water deep below the soil surface, encouraging strong root growth. 3 year life expectancy. Made of green colored UV treated and reinforced 10 mil polyethylene with heavy duty nylon zippers • Size when full: 29in H, 18in W • Drip times are adjustable from 6-10 hours • Fits 1-8in diameter trees. To irrigate 5-8in diameter trees, zip two 20 gallon units together.